Order:
  1.  19
    A sequent system of the logic r− for Rosser sentences2.Katsumi Sasaki & Shigeo Ohama - 2004 - Bulletin of the Section of Logic 33 (1):11-21.
  2.  16
    A note on Thomason's representation of S.Satoshi Miura & Shigeo Ōhama - 1977 - Notre Dame Journal of Formal Logic 18 (1):177-180.
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  3.  30
    Conjunctive normal forms and weak modal logics without the axiom of necessity.Shigeo Ōhama - 1984 - Notre Dame Journal of Formal Logic 25 (2):141-151.